// form validation function //
function validate(f) {
	  var emailRegex = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;
	  	var Duzenli = /optional/;
var hata=0;
elementler=f.elements;
toplam=elementler.length;
	for(i=0;i<toplam;i++) {
	var cnm=elementler[i].className;
 	var Sonuc = cnm.search(Duzenli);
		
		
		if(Sonuc <0) {
	
			if(elementler[i].value=="") {
				hata=1;
				inlineMsg(elementler[i],'<strong>Hata</strong><br />Bu kısım boş geçilemez.',2);
				return false;
			} 
		} 
	
	}

	if(hata==0) {
		return true;	
	} else {
		return false;
	}
}

// START OF MESSAGE SCRIPT //

var MSGTIMER = 20;
var MSGSPEED = 5;
var MSGOFFSET = 3;
var MSGHIDE = 3;

// build out the divs, set attributes and call the fade function //
function inlineMsg(target,string,autohide) {
  var msg;
  var msgcontent;
  if(!document.getElementById('fkmsg')) {
    fkmsg = document.createElement('div');
    fkmsg.id = 'fkmsg';
    fkmsgcontent = document.createElement('div');
    fkmsgcontent.id = 'fkmsgcontent';
    document.body.appendChild(fkmsg);
    fkmsg.appendChild(fkmsgcontent);
    fkmsg.style.filter = 'alpha(opacity=0)';
    fkmsg.style.opacity = 0;
    fkmsg.alpha = 0;
  } else {
    fkmsg = document.getElementById('fkmsg');
    fkmsgcontent = document.getElementById('fkmsgcontent');
  }
  fkmsg.style.zIndex=1000000045;
  fkmsgcontent.innerHTML = string;
  fkmsg.style.display = 'block';
  var fkmsgheight = fkmsg.offsetHeight;
  var targetdiv = target;
  targetdiv.focus();
  var targetheight = targetdiv.offsetHeight;
  var targetwidth = targetdiv.offsetWidth;
  var topposition = topPosition(targetdiv) - ((fkmsgheight - targetheight) / 2);
  var leftposition = leftPosition(targetdiv) + targetwidth + MSGOFFSET;
  fkmsg.style.top = topposition + 'px';
  fkmsg.style.left = leftposition + 'px';
  clearInterval(fkmsg.timer);
  fkmsg.timer = setInterval("fadeMsg(1)", MSGTIMER);
  if(!autohide) {
    autohide = MSGHIDE;  
  }
  window.setTimeout("hideMsg()", (autohide * 1000));
}

// hide the form alert //
function hideMsg(fkmsg) {
  var fkmsg = document.getElementById('fkmsg');
  if(!fkmsg.timer) {
    fkmsg.timer = setInterval("fadeMsg(0)", MSGTIMER);
  }
}

// face the message box //
function fadeMsg(flag) {
  if(flag == null) {
    flag = 1;
  }
  var fkmsg = document.getElementById('fkmsg');
  var value;
  if(flag == 1) {
    value = fkmsg.alpha + MSGSPEED;
  } else {
    value = fkmsg.alpha - MSGSPEED;
  }
  fkmsg.alpha = value;
  fkmsg.style.opacity = (value / 100);
  fkmsg.style.filter = 'alpha(opacity=' + value + ')';
  if(value >= 99) {
    clearInterval(fkmsg.timer);
    fkmsg.timer = null;
  } else if(value <= 1) {
    fkmsg.style.display = "none";
    clearInterval(fkmsg.timer);
  }
}

// calculate the position of the element in relation to the left of the browser //
function leftPosition(target) {
  var left = 0;
  if(target.offsetParent) {
    while(1) {
      left += target.offsetLeft;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.x) {
    left += target.x;
  }
  return left;
}

// calculate the position of the element in relation to the top of the browser window //
function topPosition(target) {
  var top = 0;
  if(target.offsetParent) {
    while(1) {
      top += target.offsetTop;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.y) {
    top += target.y;
  }
  return top;
}

// preload the arrow //
if(document.images) {
  arrow = new Image(7,80); 
  arrow.src = "images/msg_arrow.gif"; 
}